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科学通报  2011 

中国太行山东麓NOX重污染成因分析

, PP. 1464-1469

Keywords: 太行山东麓,遥感观测,卫星数据,对流层NO2,污染,风场,中国

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Abstract:

采用OMI/Aura对流层NO2柱浓度产品,分析研究了中国太行山东麓(ESTM)地区NOX污染的季节变化特征.研究结果表明,NO2柱浓度夏季最低而冬季最高.为了探讨该地区NO2重污染的成因,本研究采用第五代NCAR/PennState中尺度模式(MM5)对该地区风场进行模拟.MM5模式模拟结果显示,该地区的主导风向主要为东北风和西北风,其次为西南风.冬季代表月(2007年1月)中,高NO2浓度(大于50×1015molec/cm2)主要发生在以下3种风场类型辐合风场(5天),东北风(2天),静风(1天).尽管与其他发达地区相比,该地区人为源NOX的排放强度相对较小,但辐合风类型的频繁发生,以及不利于扩散的地形条件,导致了大气污染物的不断积聚,从而形成高NOX污染区.此外,当主导风向为东北风时,特别是输送气流风速较大时,可明显观察到从北京-天津-唐山地区向下风向ESTM地区的长距离传输影响.

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